Site-of-Origin(SOO) in BGP vs Site-of-Origin(SOO) in EIGRP
假設R1,R2這兩個PE之間有IBGP連線，為了避免loop因此設定SOO來辨識路由內容：
假設R1,R2之間為EIGRP neighbor，在兩個router上的interface設定SOO:
R1(config)#route-map BGP_SOO permit 10
R1(config-route-map)#set extcommunity soo 65001:1
R1(config)#router bgp 100
R1(config-router)#address-family ipv4 vrf SITE1
R1(config-router-af)#neighbor 2.2.2.2 route-map BGP_SOO in
R2(config)#route-map BGP_SOO permit 10
R2(config-route-map)#set extcommunity soo 65001:1
R2(config)#router bgp 100
R2(config-router)#address-family ipv4 vrf SITE2
R2(config-router-af)#neighbor 1.1.1.1 route-map BGP_SOO in假設R1,R2之間為EIGRP neighbor，在兩個router上的interface設定SOO:
R1(config)#route-map EIGRP_SOO permit 10
R1(config-route-map)#set extcommunity soo 300:1
R1(config)#int f0/0.1
R1(config-if)#ip vrf sitemap EIGRP_SOO
R2(config)#route-map EIGRP_SOO permit 10
R2(config-route-map)#set extcommunity soo 300:1
R2(config)#int f0/0.1
R2(config-if)#ip vrf sitemap EIGRP_SOO
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